The alleged victim, aged in his early 20s, says he was sexually assaulted by another man in the area of Belmont Road in the early hours of Sunday 30 April.
The attacker is described as 5 ft 10 ins tall, with dark messy or spiky hair. He was wearing a dark leather jacket at the time.
Early Tuesday afternoon the States police released images of a man and a woman who they wanted to trace as part of their inquiries.
In an update issued three hours later, the force said both people have now been identified.
Anyone with information is being asked to phone the States police on 612612 or Crimestoppers on 0800 555 111.
